How round is your circle?! www.howround.com

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  • เผยแพร่เมื่อ 25 ส.ค. 2024
  • This is a compilation of videos from my book, "How Round is Your Circle?". More information is available from www.howround.com

ความคิดเห็น • 1.2K

  • @Chrnan6710
    @Chrnan6710 9 ปีที่แล้ว +46

    I still don't know how round my circle is.

  • @joshuawheeler8743
    @joshuawheeler8743 8 ปีที่แล้ว +58

    There was no sound. Still watched this random recommended video

  • @amenableme1832
    @amenableme1832 12 ปีที่แล้ว +1

    I don't see why these guys aren't super popular, I found them on iTunes, they have like no traffic. Incredible vocals, I'm tearing up a little.

  • @alyssamsipe9123
    @alyssamsipe9123 8 ปีที่แล้ว +22

    I dont know what this is but I watched it

  • @roger201288
    @roger201288 9 ปีที่แล้ว +25

    Not sure what was going on with that two tip tetrahedron

    • @SYQmusic
      @SYQmusic 9 ปีที่แล้ว

      roger201288 Yeah, whats that besides looking like a triangle falling over?

    • @-danR
      @-danR 9 ปีที่แล้ว +4

      It has an intermediate 'stable' state, depending on from _where_ you release it. If it's released by its higher apex, it falls to the intermediate position before it falls down flat. From the bottom, it just falls over.

    • @roger201288
      @roger201288 9 ปีที่แล้ว

      holy shit man how did you know?? thats fucking awesome.. now i see

  • @BBlaze.
    @BBlaze. 10 ปีที่แล้ว +21

    '' This is a compilation of videos from my book, ''
    What?

    • @TheHideout0
      @TheHideout0 7 ปีที่แล้ว

      B. Blaze Hey, did you had in mind when you posted this that you were like - letting a print, and peoples years later could still see and answer to this comment ? that's goddamn badass.

  • @uwu-ww5dc
    @uwu-ww5dc 8 ปีที่แล้ว +22

    Why Am i watching this right now

  • @strangelyjamesly4078
    @strangelyjamesly4078 10 ปีที่แล้ว +6

    Solids of Constant Width is the best name ever for a Prog Rock band

  • @TimJSwan
    @TimJSwan 8 ปีที่แล้ว +32

    How do you tell TH-cam to un-recommend you a video? I've already seen this stuff.

    • @dadneeds
      @dadneeds 8 ปีที่แล้ว

      +Tim-J.Swan Channel account settings clear

    • @puttemacguff7666
      @puttemacguff7666 8 ปีที่แล้ว

      +Tim-J.Swan I have been blocking this channel many times but youtube thinks it's funk to play with my minde so they put it back in my recomended folder over and over again.

    • @gimmie55
      @gimmie55 8 ปีที่แล้ว +1

      +Tim-J.Swan on the thumbnail click the 3 grey dots then click not intrested

    • @RichardBronosky
      @RichardBronosky 8 ปีที่แล้ว

      +gimmie55 +Christopher Kim I don't see these 3 dots. Can you post a screenshot? I'd LOVE to be able to get rid of some of the recommendations I never want to click. Sometimes I click them just so they will go away.

    • @GraveUypo
      @GraveUypo 8 ปีที่แล้ว +1

      +Tim-J.Swan it's impossible. you can pick "not interested -> i've already watched this" as many times as you want, youtube will still continue recommending videos you've already watched.
      the algorithm is made entirely for maximizing profits, not to make your experience better. youtube sucks.

  • @GreedyRadish
    @GreedyRadish 8 ปีที่แล้ว +15

    How did I get here? TH-cam why?!

  • @paulbottomley42
    @paulbottomley42 11 ปีที่แล้ว +1

    Those constant width solids are beautiful.

  • @trinarystarsystem
    @trinarystarsystem 10 ปีที่แล้ว +3

    the solids of constant width blew my mind

  • @fuflang
    @fuflang 9 ปีที่แล้ว +21

    I still don't think that thing would truly drill a square hole...

    • @-danR
      @-danR 9 ปีที่แล้ว +4

      Yeah, I notice nothing touches the corners.

    • @fuflang
      @fuflang 9 ปีที่แล้ว

      lol its basically just a piece of metal rotating in a block of wood, like you said it doesn't hit the corners and it wouldn't pivot like that in a pliable surface, rather, it would drill a circular (or whatever shit shape) hole.

    • @jackmajordesync1734
      @jackmajordesync1734 9 ปีที่แล้ว +2

      fuflang if you watch at the 3:10 mark, you can see the rounded triangular part is not the cutter, but in fact part of the mechanism.There is an extrusion coming out of the rounded triangular part that is the cutter.

    • @jackmajordesync1734
      @jackmajordesync1734 9 ปีที่แล้ว

      score that cut enough and you end up with a hole, that's how drills work

    • @fuflang
      @fuflang 9 ปีที่แล้ว

      Jack McWaffle a true drill has a rotating cutting tip.. this doesnt. Not to mention it wouldn't fill out the square it's outlining..

  • @LarryTL
    @LarryTL 8 ปีที่แล้ว +12

    Someone explain the two-tip tetrahedron part please? All I see is a triangle falling sideways.

    • @meowingmono
      @meowingmono 8 ปีที่แล้ว +3

      ikr

    • @pyromstr
      @pyromstr 8 ปีที่แล้ว +1

      +Larry Sigman The first time it fell it rolled onto its tip before falling over. Second time it fell over without rolling first. A bit pointless but there you go.

  • @jumbo6498
    @jumbo6498 8 ปีที่แล้ว +2

    I have ask myself this every day and every night for the last nine years. I have put blood, sweat and tears into contemplating the circularity of my circle and I finally thought I had found the answer to my questions. Nope, my circle's circularity is still most definitely in question.

    • @andrewtomasi7372
      @andrewtomasi7372 8 ปีที่แล้ว

      From someone who has shared in this very doubt, You're circle will reach maximum circularity when the radius is constant all the way around. Let that be your guide, and may you reach that ultimate level of inner peace achieved only by those who know to what degree of trigonometric perfection their circle appertains.

  • @flash001USA
    @flash001USA 11 ปีที่แล้ว

    Back in the early 70's I used to see those shapes floating in mid air along with many colorful traces and flashes but that's another story for another time.

  • @bebop777
    @bebop777 8 ปีที่แล้ว +3

    How did I get to this dark corner of the internet

  • @Schnozinski
    @Schnozinski 8 ปีที่แล้ว +6

    Chris Sangwin: "What's deinterlacing?"

    • @mikebrodeur12
      @mikebrodeur12 8 ปีที่แล้ว

      +Baba Yaga Princeton university can figure out how to draw a straight line using hinges and brass rods but cant de-interlace an .avi file. Lol.

  • @mevanz
    @mevanz 12 ปีที่แล้ว

    Totally useful for mountain/motor bike rear suspension. The linkages let the rear wheel travel in an arc, but compresses a shock which can only be compressed along a straight path.

  • @maroneill
    @maroneill 12 ปีที่แล้ว

    Loved it. The rotation to straight-line movement things were the best.

  • @JBerg_
    @JBerg_ 10 ปีที่แล้ว +6

    anything will roll as long as it`s center of mass remains in a straight line while rolling

  • @ActuallyDavid
    @ActuallyDavid 10 ปีที่แล้ว +4

    What's with the interlace? It's distracting.

  • @TheRealDeathSheep
    @TheRealDeathSheep 11 ปีที่แล้ว

    that is the mechanism that allows the drill (that that is part of) to drill a square hole. Thats why it is sitting on a piece of wood when it shows the zoomed out bit

  • @ignishun
    @ignishun 11 ปีที่แล้ว

    The reason why this video is so interesting is that it creates movement through unexpected methods. Such as the linkages shown at the end. Such complex methods (yet relatively simple) through joints in metal pieces stabilises the flawed ability for humans to draw straight lines without the need of something the pen can use a direct guide to such as a ruler. The use of simple mechanisms can be incorporated for precise medical operations, intricate production of cars and ETMs, etc.

  • @tristancoyote1131
    @tristancoyote1131 8 ปีที่แล้ว +6

    YEaahhhhh.... It's time to go to sleep.

  • @SapkaliAkif
    @SapkaliAkif 9 ปีที่แล้ว +3

    Great video to watch when high 10\10

  • @theniq9001
    @theniq9001 12 ปีที่แล้ว

    The two-tip tetrahedron absolutely BLEW MY MIND!

  • @Stryker_can_has
    @Stryker_can_has 11 ปีที่แล้ว

    This video should be part of every discussion on interlacing.

  • @mikedang3613
    @mikedang3613 8 ปีที่แล้ว +9

    Why am I here

    • @robyca92
      @robyca92 8 ปีที่แล้ว

      +Mike Dang Nice question ...

    • @stranger534
      @stranger534 8 ปีที่แล้ว +1

      +Mike Dang Nice i love philosophy

  • @tammyphxaz
    @tammyphxaz 8 ปีที่แล้ว +7

    what does any of this have to do with anything???

    • @rippspeck
      @rippspeck 8 ปีที่แล้ว +1

      +Tamara Villa Waalkens Engineering. Oscillating motion. Pretty obvious, if you ask me.

    • @flannel7977
      @flannel7977 8 ปีที่แล้ว

      +rippspeck get roasted 🔥

    • @lekunberriko1
      @lekunberriko1 6 ปีที่แล้ว

      The important of useless things.

  • @hatjousuke
    @hatjousuke 11 ปีที่แล้ว

    I never realized just how lopsided my circle was.
    Thank you.

  • @Kanaval89
    @Kanaval89 12 ปีที่แล้ว

    This is just awesome. Brings me back to dynamics and calculus 3. People obviously don't appreciate the mathematics of this video.

  • @slap_my_hand
    @slap_my_hand 8 ปีที่แล้ว +3

    3:20 ILLUMINATI CONFIRMED!

    • @Yardoun
      @Yardoun 8 ปีที่แล้ว

      +StarTrek123456 Fuck off, jokes dead.

    • @slap_my_hand
      @slap_my_hand 8 ปีที่แล้ว

      Anthony Lamanna no.

    • @TheFringes.
      @TheFringes. 8 ปีที่แล้ว

      +StarTrek123456 What are you, fucking 10?

    • @slap_my_hand
      @slap_my_hand 8 ปีที่แล้ว

      That Guy With the Pointlessly Long Username That You Are Wasting Your Time Reading Right Now no.

  • @mattmcneice7223
    @mattmcneice7223 8 ปีที่แล้ว +14

    how incredibly unimpressive!

  • @leopaschall4580
    @leopaschall4580 9 ปีที่แล้ว +1

    yes! now i can know how round any circle is!

  • @NovaCyn
    @NovaCyn 11 ปีที่แล้ว +1

    Try painting the edges with something that leaves a trace (and roll the figures over paper) the left over patterns are quite interesting

  • @hollieham7785
    @hollieham7785 10 ปีที่แล้ว +3

    BORRRIIIIIINNNNNGGGGGGGGGGGG...................................................

    • @JBerg_
      @JBerg_ 10 ปีที่แล้ว +2

      it seems like this video wasn`t made for the likes of you...

    • @markagustin7292
      @markagustin7292 10 ปีที่แล้ว +3

      Its boring for you because you have an attention span of a 5 year old child.

    • @DirkIronside
      @DirkIronside 6 ปีที่แล้ว

      INTERESTIIIIIIIIIINNNNNNGGGGGG.....................

  • @fizzley19
    @fizzley19 12 ปีที่แล้ว

    those straight line linkages are pretty cool

  • @interrobang98
    @interrobang98 11 ปีที่แล้ว

    I thought that for a long time, but then I just realized that the reuleaux rotor-esque thing isn't what's drilling the hole, and the hole they are talking about isn't the square that's already there. The square is the shape that's being drawn by the silver thing protruding from the curved thing. You can see it best from the second angle. 2:57

  • @stickfigure42
    @stickfigure42 11 ปีที่แล้ว

    It's the little poky thing on the spinning part that moves in a perfect square.

  • @simonced
    @simonced 11 ปีที่แล้ว

    the constant width objects are so cool!

  • @lisky4u
    @lisky4u 10 ปีที่แล้ว +1

    As an engineering major, this is a cool video.

  • @yarcyk
    @yarcyk 11 ปีที่แล้ว

    I got it now. But you would need many shaped drill holders like that for different sizes holes.

  • @SpiritofPluto
    @SpiritofPluto 11 ปีที่แล้ว

    That's what I would call "a beautiful mind". Awesomeness.

  • @10231898
    @10231898 10 ปีที่แล้ว

    Love the Dudeley's dissection especially. Those hinges are fascinating with the perfect preparation of the four wooden pieces that end up as a triangle ... the next viral toy gift for "dummies." Another one reminded me of Jacob's ladder. Thanks for your careful videos.

  • @thearmadilliestone
    @thearmadilliestone 6 ปีที่แล้ว

    Years before these became popular in 3d printing circles, there was this

  • @MyLittleFantasyWorld
    @MyLittleFantasyWorld 12 ปีที่แล้ว

    When the square became a triangle. MIND BLOWN

  • @MolecularMachine
    @MolecularMachine 12 ปีที่แล้ว

    What beautiful structures!

  • @Kojak0
    @Kojak0 11 ปีที่แล้ว

    For a question like that, the video showed a remarkable lack of circles - and a lot of elaborate ways of drawing a line.

  • @TheGoodInventor
    @TheGoodInventor 12 ปีที่แล้ว

    that was magic like
    there is no need to music
    i think that was the real music
    good job sangwinc

  • @reuelckj
    @reuelckj 11 ปีที่แล้ว

    3:39 is how you check how round your circle is
    3:59 and 4:28 is to check how straight your line is

  • @grandexandi
    @grandexandi 11 ปีที่แล้ว

    I'm not sure what I just watched, but I enjoyed it very much!

  • @hydroman333
    @hydroman333 12 ปีที่แล้ว

    I do love the "drilling a square hole." The bit doesn't look balanced and, if you actually put that thing on a drill that rotated at high rpms, it looks like it would be really, really unstable.

  • @VoidghostII
    @VoidghostII 12 ปีที่แล้ว

    The square hole literally blew my mind

  • @WesternEasternTruth
    @WesternEasternTruth 11 ปีที่แล้ว

    The drilling of the square hole isn't getting all the way into the corners, it would still be a mostly round hole.

  • @joshualiebig9972
    @joshualiebig9972 11 ปีที่แล้ว

    Thank you for not having annoying background music

  • @ukraine55
    @ukraine55 11 ปีที่แล้ว

    Now I get it! Wow it was right in front of me.... Thanks.
    Great background song!

  • @N00Br101
    @N00Br101 12 ปีที่แล้ว

    Lol, when i got back and re-watch it i laughed SO hard!

  • @2-up601
    @2-up601 11 ปีที่แล้ว

    I'm surprised the number of corrupted comments on such an amazing display of machinery, keep it up!

  • @TheCaptainsAntics
    @TheCaptainsAntics 12 ปีที่แล้ว

    This... Is so beautiful.

  • @supercalo79
    @supercalo79 12 ปีที่แล้ว

    i loved the solids of constant width. were the people who made these geniuses?

  • @plutarkosky
    @plutarkosky 11 ปีที่แล้ว

    the soundtrack had me in tears

  • @13meli55a
    @13meli55a 11 ปีที่แล้ว

    No, actually. The point isn't to drill with the edges of the shape. The bit would be on the little round thing protruding from the shape. The square it's in is just to guide it. Anything else that seems useless or wrong probably isn't, if you know what it's for. Check out the website.

  • @Daniel39363
    @Daniel39363 11 ปีที่แล้ว

    The two tip tetrahedron was definitely the best one.

  • @driverfilms
    @driverfilms 8 ปีที่แล้ว

    It turns out, my circle is not as round as I originally thought it was.

  • @UlyssesKrunk
    @UlyssesKrunk 12 ปีที่แล้ว

    The thing point out of it moves in a square, so it you replace that with a pencil and did in on a piece of paper it would draw a perfect squared.

  • @wyattsheffield6130
    @wyattsheffield6130 11 ปีที่แล้ว

    they have a curvature of zero on each end, which means they can be balanced and stacked on top of one another.

  • @VentureTact
    @VentureTact 11 ปีที่แล้ว

    We can already drill square holes, it's called a mortise.

  • @najsbajsmedmajs
    @najsbajsmedmajs 12 ปีที่แล้ว

    the slotted eclipses were really trippy!

  • @sept1ne
    @sept1ne 12 ปีที่แล้ว

    I thought that at first myself.
    I think it is that it appears to form a tetrahedral shape while it falls despite only having three sides/vertices.

  • @TheJonJC
    @TheJonJC 12 ปีที่แล้ว

    Before watching the video I saw your comment and my hopes was high, and was like when the hell is the music going to come in.

  • @hriscaayoma1913
    @hriscaayoma1913 11 ปีที่แล้ว

    It's called a rattleback. Check out the wiki article. They're pretty neat little things.

  • @DirtyDirtbag
    @DirtyDirtbag 12 ปีที่แล้ว

    why is everyone dissing this video. This is some cool stuff.

  • @Lactuca
    @Lactuca 11 ปีที่แล้ว

    there are square drill bits though. A fellow named v8hatch has a video of one made by a chinese company up on his channel and there are other videos around. Theyre amazing, and significantly more complicated than what was presented here.

  • @partack1
    @partack1 12 ปีที่แล้ว +1

    Intriguing and thought provoking mechanisms. thank you for sharing. =)

  • @FireHaze
    @FireHaze 11 ปีที่แล้ว

    Hope you understand its about the tip( the smal round thing infront of the triangle thingy)

  • @spiderplant3
    @spiderplant3 11 ปีที่แล้ว

    gotta say, the two-tip tetrahedron at 2:01 really wiped the floor with the rest of them.

  • @Jago1k986
    @Jago1k986 12 ปีที่แล้ว

    best looking book i ever read

  • @AZREDFERN
    @AZREDFERN 12 ปีที่แล้ว

    If they made a universal drill bit that made square holes... i'd buy it

  • @Dhoyos7
    @Dhoyos7 11 ปีที่แล้ว

    This is wonderful!

  • @Erpty05
    @Erpty05 8 ปีที่แล้ว

    this is so beautiful

  • @ThinkCleverAndSmart
    @ThinkCleverAndSmart 10 ปีที่แล้ว

    At 4.08 is how AMF did make their sweeps for their pinspotters. (bowling machines)

  • @dwerg1
    @dwerg1 11 ปีที่แล้ว

    I constantly kept checking if my sound was enabled...

  • @StoogesTattoo
    @StoogesTattoo 10 ปีที่แล้ว

    Using this as a sleep-aid. Thanks

  • @AsianCheeseToaster
    @AsianCheeseToaster 11 ปีที่แล้ว

    Oh, boy! That egg sure was super!

  • @mmmmm9872345
    @mmmmm9872345 12 ปีที่แล้ว

    Beautiful!

  • @Power5
    @Power5 12 ปีที่แล้ว

    You designed the most complicated ruler on the planet that could only draw a few inch long line utilizing at least 3 times as much desk space as the line you wanted to draw.

  • @redsite001
    @redsite001 12 ปีที่แล้ว

    Lol when I see the title I was like "pretty freakin round!" so I clicked on it hahaha
    dirty thoughts!

  • @PendragonDaGreat
    @PendragonDaGreat 12 ปีที่แล้ว

    The description says this is a compilation of videos from the book of that title. I'm assuming it's an in depth text with these videos on a CD or TH-cam as clarification for some of the more complex points. Such as the objects of constant width. Who would ever believe that something other than a sphere would do that without at least a little proof? Those shapes (and the square drill bit) are based off the Reuleaux triangle, made through the intersection of three circles of the same diameter.

  •  10 ปีที่แล้ว

    I love this.

  • @Basibisab
    @Basibisab 11 ปีที่แล้ว

    The Two-tip-Tetrahedron seems freaking awesome!

  • @izaks14
    @izaks14 11 ปีที่แล้ว

    I can imagine the slotted elipses would have a lot of force in small areas if it was used for automobiles. And placing the axle properly seems complicated. but youre right, transportation needs to be reinvented from the ground up

  • @ZomgNom
    @ZomgNom 12 ปีที่แล้ว

    Yeah, Hart's A-Frame is pretty cool, but I tend to just use a straight-edge

  • @Superdingo13
    @Superdingo13 12 ปีที่แล้ว

    When scientists first started experimenting with electricity hundreds, I would almost guarantee most people would have said something similar and seen no practical uses for electrical technology. Just because something doesn't look like it has a use now, doesn't mean it won't at some point. Modern math and science is based on its foundations, and the more we know now, however trivial it seems, the more we can do tomorrow.

  • @xkxcaliforlifexkx
    @xkxcaliforlifexkx 12 ปีที่แล้ว

    I found out my circle is pretty round. Good shit

  • @Jackcabbit
    @Jackcabbit 11 ปีที่แล้ว

    I decided to play Chaccaron Maccaron in the background and it's actually rather amusing.

  • @cow31523
    @cow31523 12 ปีที่แล้ว

    the super egg was really cool.

  • @timberwolf5769
    @timberwolf5769 11 ปีที่แล้ว

    I could play with all of this for hours if not days. If you see a death in the news of some kid who watched slotted Elipses all day, send a flag to my wife.

  • @AcEkrystal
    @AcEkrystal 11 ปีที่แล้ว

    I don't see what is so special about making some reandom objects that is pure logic and then name it after yourself..

  • @TF8ase
    @TF8ase 11 ปีที่แล้ว

    Beautiful.